M6.7: Parchment theme pass

Lights up the M5 codex design system across the wizard. Default
palette swaps from dark leather to aged-parchment cream with
sealing-wax red selection emphasis, matching the React prototype's
default theme variant. CodexTheme.Build() is applied at the wizard
root so every step + Aside + popover cascades through it.

Theme additions:
- Parchment palette in CodexPalette (Dark retained as alt)
- Type variations registered for Card, CodexPopover, Pill,
  PillDetriment, AbilityToken, AbilitySlot, SkillRow — without
  SetTypeVariation, panel-stylebox lookup falls through to Godot's
  default dark slate, which is what was happening to every bare
  PanelContainer before this pass.
- panel_hover stylebox on Card (gild border) wired via CodexCard's
  MouseEntered/Exited helper; panel_selected bumped to 3px seal-red
  border + soft shadow so selection reads at a glance.

Card selection refactor:
- Replaced the warm-cream Modulate hint on cards with stylebox swaps
  via the new CodexCard.SetSelected helper. The Modulate approach
  was a no-op on cream-on-cream parchment; the stylebox swap looks
  the same on either palette.
- Step intros + Aside section headers now use the existing Eyebrow /
  H2 / H3 / CardName / CardMeta / CardBody label variations.
- Confirm button on Step VIII uses the PrimaryButton variation.

Popover + chip behaviour:
- PopoverLayer is now MouseFilter=Ignore so clicks/scroll/hover all
  pass through. Adjacent chips fire reliably even when the previous
  popover overlaps them spatially.
- Dropped the 80ms grace timer; chip MouseExited closes immediately.
- TraitChip MouseFilter Stop → Pass so clicks bubble up to the
  parent card's GuiInput (selecting the card).

Misc:
- Wizard._Ready inserts a backing Panel so the parchment Bg fills
  the canvas — Wizard root is a plain Control, which paints nothing.
- CodexTheme font lookup tries Cormorant-Medium before -Regular and
  globalizes res://Fonts/ for runtime FontFile load (the previous
  fallback used ContentPaths which points at a sibling data tree).
- StepStats final-score Label rendered at font_size 22 to match the
  AbilityToken die.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Theriapolis.Godot/Scenes/Aside.cs

@@ -75,6 +75,7 @@ public partial class Aside : MarginContainer
         {
             Text = name,
             HorizontalAlignment = HorizontalAlignment.Center,
+            ThemeTypeVariation = "H3",
         });
         _content.AddChild(new HSeparator());
     }
@@ -143,6 +144,7 @@ public partial class Aside : MarginContainer
         {
             Text = label,
             HorizontalAlignment = HorizontalAlignment.Center,
+            ThemeTypeVariation = "Eyebrow",
         });
         col.AddChild(new HSeparator());
         return col;
@@ -155,8 +157,7 @@ public partial class Aside : MarginContainer
 
         // Smaller font on the label tag — keeps the row compact in the
         // narrow side rail.
-        var lbl = new Label { Text = label.ToUpperInvariant() };
-        lbl.AddThemeFontSizeOverride("font_size", 11);
+        var lbl = new Label { Text = label.ToUpperInvariant(), ThemeTypeVariation = "Eyebrow" };
         v.AddChild(lbl);
 
         // Autowrap on the value so long names ("Hybrid Underground")
@@ -176,7 +177,7 @@ public partial class Aside : MarginContainer
 
     private void BuildAttributes()
     {
-        _content.AddChild(new Label { Text = "ATTRIBUTES" });
+        _content.AddChild(new Label { Text = "ATTRIBUTES", ThemeTypeVariation = "Eyebrow" });
 
         // Self-contained sub-panel so the attributes table never widens
         // beyond the Aside's own rect. Columns: ab | bonus | final | d20.
@@ -241,7 +242,7 @@ public partial class Aside : MarginContainer
 
     private void BuildPills()
     {
-        _content.AddChild(new Label { Text = "TRAITS · FEATS · SKILLS" });
+        _content.AddChild(new Label { Text = "TRAITS · FEATS · SKILLS", ThemeTypeVariation = "Eyebrow" });
 
         var flow = new HFlowContainer();
         flow.AddThemeConstantOverride("h_separation", 6);